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Finding the Fourth Proportional to 423,813.12, 585,380.16 and 316,858.56

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Solution

The fourth proportional to 423,813.12, 585,380.16 and 316,858.56 is: 437,652.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,813.12 : 585,380.16 = 316,858.56 : x
  2. Step 2: Convert to fraction form
    423,813.12/585,380.16 = 316,858.56/x
  3. Step 3: Cross multiply
    423,813.12x = 585,380.16 × 316,858.56
  4. Step 4: Simplify right side
    423,813.12x = 185,482,714,550.17
  5. Step 5: Solve for x
    x = 185,482,714,550.17/423,813.12
  6. Step 6: Final answer
    x = 437,652.13

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.